<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>box-shadow方案</title>
</head>
<style>
	.shadow{
		background-color: #99CC66;
		width: 400px;
		height: 400px;
		margin: 50px;
		box-shadow: 0 0 0 10px #655, 0 0 0 15px deeppink;
	}
</style>
<body>
	<div class="shadow"></div>
</body>
</html>